feat(options): add defu for options resolution and update types

This commit introduces the 'defu' library for options resolution in
'src/options.ts'. It also updates the types for options, making some
fields optional and others required. The 'package.json' and
'pnpm-lock.yaml' files are updated to include the new dependency.

Author: ryoppippi

package.json

@@ -17,6 +17,7 @@
 	"dependencies": {
 		"await-to-js": "^3.0.0",
 		"camelcase-keys": "^9.1.3",
+		"defu": "^6.1.4",
 		"knitwork": "^1.1.0",
 		"lightningcss": "^1.25.1",
 		"magic-string": "^0.30.11",

pnpm-lock.yaml

@@ -1,4 +1,5 @@
-import type { SetRequired } from 'type-fest';
+import type { RequiredDeep, SetOptional, SetRequired } from 'type-fest';
+import { defu } from 'defu';
 
 /**
  * Options for the cssModules preprocessor
@@ -23,11 +24,13 @@ export type Options = {
 	convertToCamelCase?: boolean;
 };
 
-export type ResolvedOptions = SetRequired<Options, 'includeOriginalPath'>;
+export type ResolvedOptions = SetOptional<RequiredDeep<Options>, 'moduleNameingPattern'>;
 
-export function resolveOptions(options: Options): ResolvedOptions {
-	return {
-		moduleNameingPattern: options.moduleNameingPattern,
-		includeOriginalPath: options.includeOriginalPath ?? true,
-	};
+const defaultOptions = {
+	includeOriginalPath: true,
+	convertToCamelCase: true,
+} as const satisfies ResolvedOptions;
+
+export function resolveOptions(options: Options): Readonly<ResolvedOptions> {
+	return defu(options, defaultOptions);
 }